T style filters

Hi everyone,

Just read the blog about filters and got me thinking.

I have city water. It comes from city wells. Every few months we get a rush of dark brown water from the city. I'm not sure what it is, could be iron. I have a whole house pre filter and the white filter element turns black after a couple of weeks!!

I always get so proud when someone reads something I wrote.
They have a very rough psi loss chart.
For a 1" filter highest flow they show on the chart is 40gpm.
Lose 9psi at 40gpm, 5 psi at 30gpm, 2psi at 20gpm.